I can across a random tidbit today that seemed…impossible. Since the discovery of Pluto in February of 1930, — which admittedly isn’t that long ago, science-wise — it hasn’t completed a single orbit around the sun. And it won’t until September of 2178. Ten generations will have passed from the earth (well, maybe a bit less considering everyone’s having children later and living quite a bit longer these days) in the time it takes for Pluto to march itself around the sun.*
Which leads me to another awesome fact that shows how our understanding of time is completely messed up: The Aztec Empire is younger than Cambridge University. This is my favourite random fact to bring out at parties because it just doesn’t seem like it could possibly be true.